Just happened to noticed this, but for some reason InSync has started deleting files (again) - and I can’t work out why. I certainly didn’t ask it to…
The only thing I can think of is that is has something to do with symlinks: the files that went poof were all in directories that had symlinks pointing to them from outside the insync/drive root folder. The other issue I (still) have also appears to be related to symlinks: https://forums.insynchq.com/t/errors-insync-tries-to-sync-files-in-excluded-symlinked-folders/12419/5